2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

Imaging Without Borders

2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

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Paper Detail

Paper IDIMT-CIF-1.2
Paper Title PLUG-AND-PLAY IMAGE RECONSTRUCTION MEETS STOCHASTIC VARIANCE-REDUCED GRADIENT METHODS
Authors Vincent Monardo, Abhiram Iyer, Carnegie Mellon University, United States; Sean Donegan, Air Force Research Lab, United States; Marc De Graef, Yuejie Chi, Carnegie Mellon University, United States
SessionIMT-CIF-1: Computational Imaging 1
LocationArea J
Session Time:Monday, 20 September, 13:30 - 15:00
Presentation Time:Monday, 20 September, 13:30 - 15:00
Presentation Poster
Topic Computational Imaging Methods and Models: Learning-Based Models
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Abstract Plug-and-play (PnP) methods have recently emerged as a powerful framework for image reconstruction that can flexibly combine different physics-based observation models with data-driven image priors in the form of denoisers, and achieve state-of-the-art image reconstruction quality in many applications. In this paper, we aim to further improve the computational efficacy of PnP methods by designing a new algorithm that makes use of stochastic variance-reduced gradients (SVRG), a nascent idea to accelerate runtime in stochastic optimization. Compared with existing PnP methods using batch gradients or stochastic gradients, the new algorithm, called PnP-SVRG, achieves comparable or better accuracy of image reconstruction at a much faster computational speed. Extensive numerical experiments are provided to demonstrate the benefits of the proposed algorithm through the application of compressive imaging using partial Fourier measurements in conjunction with a wide variety of popular image denoisers.